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Revista da Sociedade Brasileira de Medicina Tropical 39(1):14-21, jan-fev, 2006
Immunotherapy, immunochemotherapy and chemotherapy
for American cutaneous leishmaniasis treatment
Imunoterapia, imunoquimioterapia e quimioterapia no
tratamento da leishmaniose tegumentar americana
Wilson Mayrink1, Ana Cristina de Carvalho Botelho1, 3, Paulo Araújo Magalhães6†,
Sebastião Mariano Batista1†, Antonio de Oliveira Lima7†, Odair Genaro1†, Carlos Alberto da Costa4,
Maria Norma de Melo1, Marilene Susan Marques Michalick1, Paul Williams1,
Magno Dias2, Waleska Teixeira Caiaffa8, Evaldo do Nascimento1
and George Luiz Lins Machado-Coelho2
ABSTRACT
The first choice of treatment for American cutaneous leishmaniasis is the pentavalent antimonial drug. Although it has been shown
that this treatment is mostly effective and indicated, some disadvantages should be taken into account such as side effects, long
term treatment inconveniences and counter-indication for patients suffering from cardiopathy, nephropathy; yet, aging, pregnancy
and other conditions. With the advent of the vaccine anti-American cutaneous leishmaniasis as a prophylactic measure, studies on
therapy using the vaccine associated or not with other drugs have been performed by many investigators and it is currently among
the alternative treatments and prevention measures for American cutaneous leishmaniasis. In conclusion, the association between
antimony and vaccine (immunochemotherapy) showed the same cure rate when compared with the standard treatment (100%)
and it was also able to reduce the salt volume in 17.9% and treatment length from 87 to 62 days, decreasing side effects.
Key-words: American cutaneous leishmaniasis. Treatment. Immunotherapy.
RESUMO
O tratamento de primeira escolha para leishmaniose tegumentar americana é o antimonial pentavalente. Embora este tratamento
seja na maioria das vezes efetivo e indicado, devem ser consideradas as desvantagens tais como efeitos colaterais, longa
duração do tratamento e contra-indicação para cardiopatas, nefropatas, idosos, grávidas e outras condições. Com o advento
da vacina antileishmaniose tegumentar americana para fins profiláticos e terapêuticos, associando-a ou não a outros fármacos,
muitas pesquisas têm sido desenvolvidas, sendo a vacina a principal entre os atuais recursos no tratamento e prevenção da
leishmaniose tegumentar americana. Em conclusão, a associação do antimônio com a vacina (imunoquimioterapia) apresentou
o mesmo índice de cura em relação ao tratamento padrão (100%), e ainda reduziu o volume do sal em 17,9% e o tempo de
cura significativamente, de 87 para 62 dias; conseqüentemente, reduzindo os efeitos colaterais.
Palavras-chaves: Leishmaniose tegumentar americana. Tratamento. Imunoterapia.
1. Departamento de Parasitologia do Instituto de Ciências Biológicas da Universidade Federal de Minas Gerais, Belo Horizonte, MG. 2. Departamento Farmácia da Escola
de Farmácia da Universidade Federal de Ouro Preto, Ouro Preto, MG. 3. Centro Pesquisas René Rachou da Fundação Oswaldo Cruz, Belo Horizonte, MG. 4. Departamento
de Parasitologia da Faculdade de Farmácia da Universidade Federal de Minas Gerais, Belo Horizonte, MG. 5. Departamento de Ciências Biológicas da Universidade
Federal de Ouro Preto, Ouro Preto, MG. 6. Superintendência de Campanha Sanitária do Ministério da Saúde. 7. Fundação Ataulfo Paiva, Belo Horizonte, MG.
8. Departamento de Medicina Preventiva e Social da Faculdade de Medicina da Universidade Federal de Minas Gerais, Belo Horizonte, MG.
†
In memoriam.
Supported by FAPEMIG, SMSC, CNPq, UFMG, CISMRC
Address to : Dr. Wilson Mayrink. Rua Equador 140/201, Bairro São Pedro, 30330-390 Belo Horizonte,MG, Brasil
Tel: 55 31 3287-3038
e-mail: [email protected]
Recebido para publicação em 2/7/2004
Aceito em 23/11/2005
14
Mayrink W et al
Leishmaniasis is a disease caused by several digenetic
protozoan species of the genus Leishmania , which affect
humans and different domestic and sylvatic animal species.
The disease may arise in different forms and the most
important are: American visceral leishmaniasis (AVL) or
American kala-azar and American cutaneous leishmaniasis
(ACL). The latter, is primarily a disease that affects sylvatic
animals. Leishmaniasis is transmitted to humans through the
female bite of female haematophagous insect vectors of the
genus Lutzomyia, which are known, in Brazil, as ‘birigüi’,
‘mosquito-palha’ or ‘cangalhinha’.
ACL is a polymorphic disease of skin and mucous membranes
with single or multiple ulcerative lesions (simple cutaneous
form), nodular lesions (diffuse form) or mucocutaneous lesions
(mucocutaneous form), affecting nasopharynx regions
simultaneously with or just after an initial cutaneous infection.
Such variation is closely related to the patient’s immunological
status and the Leishmania species involved. ACL constitutes an
important health problem mainly because of its difficult
prevention. The World Health Organization (WHO) estimates
around 1-2 million annual new cases annually78.
Up to 1912, leishmaniasis treatment had been
unsatisfactory. Row62 reported results on the curative properties
of promastigote forms, from Leishmania culture, used as a
vaccine in the treatment for Oriental sore; this therapy was
then abandoned due to a new systemic treatment with
antimonial drugs introduced that year by the Brazilian physician
Gaspar Vianna76. This investigator used emetic tartar at 1%,
which proved to be more efficient than the vaccine.
Emetic tartar has been the only therapeutic alternative for
leishmaniasis for many years and because of its toxicity,
administration difficulties and unsatisfactory efficacy (frequent
recurrences), it was, at last, replaced with pentavalent
antimonial drugs21 25. Despite its counter-indications for elderly
patients and other conditions, such as cardiopathy, nephropathy
and pregnancy, the pentavalent antimonial drug represents the
standard therapy for leishmaniasis nowadays.
Since the introduction of antimonial drugs for
leishmaniasis therapy, which have also been shown to produce
divergent results2 3 8 17 18 20 24 26 29 33 44 49 51 52 60 63 65 66 70 74, several
studies have been carried out in order to establish the best
therapeutic plan.
With the advent of the ACL vaccine for prophylactic aims,
idealized by Gomes 23, Pessoa and Pestana 55, modified by
Mayrink et al35 36, and proved by Antunes et al4 and Armijos et al5,
its therapeutic use has been under study, whether alone or
associated with other drugs; and it has also been regarded as
one of the current treatments, as well as one of the available
prophylactic measures for ACL14 22 28 35 39 43.
Reports on the use of chemotherapy associated with
immunotherapy have shown considerable efficacy in some
cases of diffuse leishmaniasis37 71 72.
Immunotherapy combined with the use of BCG, first
performed by Convit14, showed cure rates and treatment length
comparable with those obtained through standard treatments
with Glucantime.
The present work was aimed at: 1) using immunotherapy in
ACL patients for whom antimonial drugs are restricted and;
2) using immunotherapy combined with chemotherapy
(immunochemotherapy), since we observed that an
immunological stimulus associated with a chemotherapy
treatment leads to a reduction in antimony volume and treatment
period. This complex provides substantial benefits to the patient,
reducing their visits to the outpatient facility, thus, diminishing
ambulatory expenses, among many other advantages, when
compared to the standard therapy. This process is described in
detail in the present work.
The current work is aimed at evaluating the clinical effects
among different therapeutic plans and not at assessing the
immunological aspects involved in such responses, which has
been widely studied by other investigators7 10 12 15 16 19 42 47 58 59 75.
PATIENTS AND METHODS
Population studied. A sample of 542 patients diagnosed
with ACL, including males and females aged over five years
old (Table 1), was randomly selected in a open assay from a
group of subjects attending the Outpatient Facility Paulo
Araújo de Magalhães in Caratinga, Minas Gerais. The present
investigation and the protocols comply with the Research
Ethics Committee of Instituto de Ciências Biológicas of
Universidade Federal de Minas Gerais-ICB/UFMG.
Diagnosis. Individuals with typical cutaneous lesions
were clinically diagnosed as being carriers of ACL. Clinical
diagnosis was confirmed through positive parasitological
examination and/or Montenegro skin test (MT).
Parasitological examination. Parasitological
examination was confirmed by the presence of amastigote
forms of the parasite in skin biopsies from the lesions. The
examination was carried out by compressing the tissue from
biopsy between two histological slides, after removing blood
excess blood with filter paper. The material collected was
fixed in methanol, Giemsa stained and, then, examined under
light optical microscopy (magnification 1,000X).
Montenegro test. Montenegro antigen was produced under
sterile conditions from cloned promastigote cultures of I-III-D
Leishmania (Leishmania) amazonensis, which were killed,
sonicated and kept in merthiolate solution at 1:10,00040. A volume
of 0.1mL of the antigen with 40µg/mL of nitrogen38 41 was injected
into intradermal layer in the inner side of the arm. Positivity was
indicated after nodule formation, 48 hours post test, without
considering erythematous areas.
Comitê de Ética em Pesquisa da Universidade Federal de Minas Gerais - ETIC 016/00.
15
Revista da Sociedade Brasileira de Medicina Tropical 39(1):14-21, jan-fev, 2006
Table 1 - Demographic and clinical characteristics of the treated American cutaneous leishmaniasis patients.
Groups
Therapeutic
scheme
Number of
cases
Male
Age average
Malnutrition
Disease
Number
gender
(years)
(%)
period
of lesions
(%)
(month)
2
QT 0.5
29
58.6
23.4
13.8
2.1
1.1
1
QT 1.0
39
61.4
30.6
4.7
2.4
1.3
3
IT serial
53
64.2
33.2
9.6
5..9
1.2
1
QT 1.0
35
51.4
30.8
2..9
4.2
1.3
4
QT 1.0
38
50.0
21.5*
NR
2.4
1.4
1
QT 1.0
49
59.2
31.0
NR
2.7
1.3
5
IQT 0.5
47
44.7
27.3
14.9
2..3
1.3
1
IQT 1.0
44
61.4
30.6
4.7
2.4
1.3
6
colliquation
47
68.1
27.7
14.9
3.0
1.4
7
IT and BCG monthly 58
70.7
26.0
7.0
3.3
1.4
8
BCG monthly
13
53.8
26.8
15.4
3.6
1.2
9
IT monthly
12
33.3
28.1
16.7
2.9
1.1
1
QT 1.0
78
61.5
30.8
14.1
2.7
1.3
Total
542
59.3
28.6
10.8
5.3
1.3
QT 1.0: Standard Group , * Significant difference when compared with standard group. MT: Montenegro Test.
Vaccine. The vaccine was prepared by the Laboratory of
Leishmaniasis of the Department of Parasitology, ICB – UFMG,
using dead promastigote forms of Leishmania (Leishmania)
amazonensis, strain IFLA/BR/67/PH8, in accordance with the
technique proposed by Mayrink et al36 under quality control
patterns of the Pharmacy School of UFMG.
BCG. BCG, used as coadjutant (BCG, Calmete Bacillus Guerin da Fundação Ataulfo Paiva, Rio de Janeiro, RJ), was
reconstituted by dilution in 1mL solution (100µg/mL).
Antimoniate N-methyglucamine. The pentavalent
antimonial (Sb v ) used here was N-methyglucamine
(Glucantime; Rhodia, São Paulo, Brazil), comprising 85mg
pentavalent antimonial per mL.
Therapy. Group 1 (Standard treatment) Chemotherapy I
(QT 1.0). This group consisted of 245 patients treated with
Glucantime. It was slowly administered through
intramuscular route, at a daily dose of 1mL/5kg body weight,
without exceeding 10mL/day, for 10 days. After a 10-day
interval, this treatment was repeated. This period of 10 days
of treatment plus 10 days of interval was named one series of
treatment and it is carried out, and repeated until complete
clinical cure of the patients is achieved.
Group 2. Chemotherapy II (QT 0,5). This group
comprised 29 patients under treatment with Glucantime,
at a daily dose of 0.5mL/5kg body weight. The administration
was performed as described above and the maximum daily
dose did not exceed 5mL/day.
Group 3. Serial immunotherapy (IT serial): in this group,
53 patients, underwent subcutaneous administration of the
vaccine (nitrogen total concentration: 360µg/mL)
administered to the top outer forearm, according to the
method proposed by Mayrink35 as follows: first day- 100mL;
second day- 200µL; third day- 300µL; fourth day- 400µL and
from the fifth to the tenth day- 500µL.
After a 10-day interval, daily doses of 500mL were
administered.
16
Lesion
(cm)
MT
(cm)
MT+ (%)
2.6
4.9
3.1
3.2
3.6
4.6
3.6
5.0
3.4
3.7
7.5
5.9
4.7
4.1
7.8*
5.2
2.8
3.9
3.7
5.3
7.1
5.2
4.8
5.6
7.2
7.8
5.2
5.2
82.8
81.8
73.1
85.3
89.2
83.7
85.1
81.8
72.3
81.0
84.6
100.0
84.6
82.4
Positive
parasitological
exam (%)
92.9
84.1
88.7
87.9
89.5
93.6
85.1
84.1
87.0
89.7
76.9
58.3*
94.8
89.0
Group 4. Immunochemotherapy I (IQT 1,0). In this group,
38 patients were administered anti-ACL vaccine through
subcutaneous route, as described for Group 3, simultaneously
with Glucantime through intramuscular route at a dose of
1mL/kg body weight, as used for Group 1.
Group 5. Immunochemotherapy II (IQT 0.5). A group of 47
patients were given subcutaneous anti-ACL vaccine, as described
for Group 3, simultaneously with Glucantime through
intramuscular route at a dose of 0,5mL/5kg body weight, as used
for Group 2.
Group 6. Colliquation (BCG + Glucantime). A group of
47 patients were administered 100µg intradermal BCG after
15 to 20 days of stimulation with the onset of colliquation,
Glucantime was used at a dose of 1mL/5kg body weight, as
described for Group 1.
Group 7. Monthly immunotherapy with BCG (100µg) (IT
and BCG monthly). Fifty-eight patients were submitted to
monthly intradermal doses of an association of 0.6mL of
vaccine with 100µg BCG until clinical cure was achieved,
without exceeding a period of five months under treatment.
Group 8. Monthly BCG. Thirteen patients were treated with
monthly intradermal doses of 100µg of BCG, administered
into the deltoid muscle.
Group 9. Monthly immunotherapy (IT monthly). In this group,
12 patients were treated with monthly doses of 0.6mL vaccine.
Therapeutic failure. It should be noted that each
therapeutic plan was maintained until complete clinical cure
was achieved; if cure was not effected after two series, the
plan was, then, substituted for the standard therapy (serial
chemotherapy with Glucantime).
Cure criterion. The cure criterion was clinical, i.e., total
healing of cutaneous lesions and epithelization of the skin.
Statistical analysis. Variance analysis for treatment
period analysis, adjusted by age, disease period, and MT area
was used 73 . A significance level of 95% was taken into
account.
Mayrink W et al
RESULTS
A total of 542 patients with positive ACL diagnosis were
divided into 9 treatment groups. The demographic and clinical
characteristics of the groups studied are shown in Table 1. The
frequency of male gender was 59.3% and the mean age was 28.6
years old (ranging from 5 to 86 years old). No significant
relationship regarding the gender and age of the patients was
found among the groups tested, including the standard group.
Malnutrition, defined by body mass index (BMI = weight/
height2), was observed in 10.8% of the patients, which was shown
to be similar for all the groups under study (Table 1).
The period of ACL disease, defined as the time taken
between the initial observation of the lesion, reported by the
patient, and clinical diagnosis, ranged from 10 days to 43.4
months with an average of 5.3 months. The number of lesions
varied from 1 to 3, and their mean diameter was 4.1cm. The
mean MT area, which was showen to be positive in 82.4% of
patients, was 5.2cm. The parasitological exam was positive in 89%
of patients. No relationship between the number of lesions, disease
period, and area of ulcers was observed among patients (Table 1).
The treatment period of the groups under study and the volume
of antimony necessary to achieve cure are shown in Table 2.
The average length of treatment in days for clinical ACL cure
was: 94.6 for Group 1; 81.0 for Group 2; 172.8 for Group 3;
64.7 for Group 4; 105.5 for Group 5; 91 for Group 6; 177.2 for
Group 7; and 159.5 and 226.7 days for Groups 8 and 9,
respectively.
The therapy plans used in Groups 1, 4, 5, and 6 achieved
clinical cure in 100% of the patients with varying periods
(days) of 94, 64, 105 and 91 days, respectively.
Group 3, under immunotherapy, showed 98.1% of cured
patients, despite its increased treatment length when
compared with the standard group.
The average number of series, comprising all therapies,
ranged from 3.3 to 11.3.
Table 2 - Therapy plans under study for the treatment of American cutaneous leishmaniasis patients.
Groups
Therapy
Number of patients/
Cure
Mean number
Reduction of
Number of series of
Mean time of treatment
Number of cured cases
percentage
of series a
SBv volume (%)
Glucantime in case resistance
until cure (day)
2
QT 0.5
29/29
100.0
4.2
50.0
82.2
1
QT 1.0
39/39
100.0
4.6
100.0
94.6
3
Serial
53/52
98.1
8.7
17.9
7.0
172.8
1
T 1.0
35/35
100.0
4.2
33.3
82.5
4
T 1.0
38/38
100.0
3.3*
7.7
64.7
1
T 1.0
49/49
100.0
4.8
100.0
94.8
5
T 0.5
47/47
100.0
5.4
100.0
105.5
1
T 1.0
44/44
100.0
4.8
100.0
94.6
6
Colliquation
48/48
100.0
4.7
91.0
7
IT and BCG monthly
58/27
46.6*
8.9*
3.6
177.2*
8
BCG monthly
13/4
38.8*
8.0*
4.2
159.5*
9
IT monthly
12/3
25.0
11.3*
4.3
226.7*
1
T 1.0
78/78
100.0
4.4
86.5
Total
542
89.9
5.7
3.9
113.1
1 QT 1.0: Standard Group, * Significant difference when compared with standard group.a Adjusted by disease time, lesion area and area of Montenegro test.1/ QT 1.0:
Glucantime 1,0mL/5kg body weight Standard Therapy, 2/ QT 0.5: Glucantime 0,5mL/5kg body weight, 3/ IT serial: Vaccine serial, 4/ IQT 1.0: Vaccine + Glucantime 1mL, 5/ IQT
0.5: Vaccine + Glucantime 0,5mL, 6/ Colliquation: BCG + Glucantime, 7/ BCG IT montly: BCG+ vaccine monthly, 8/ Monthly BCG, 9/ Vaccine Monthly immunotherapy
DISCUSSION
No individual aspect of the patients or possible
correlations with age, gender, nutritional status and number
of lesions was shown to have a significant difference through
variance analysis among the groups under study.
Based on these results, immunotherapy (Group 3) may
be an alternative treatment for those patients for whom
Glucantime is not indicated.
By associating the vaccine with the standard application
of Glucantime (Group 4), a reduction in the volume of
antimony (17.9%) and treatment length for clinical cure
(from 94.6 to 64.7 days) was observed, when compared with
the standard treatment (Group 1).
In the case of immune-stimulation with vaccine, an
enhancement in interferon γ and interleukin 2 (IL-2)
production was observed potentializing the response type Th1
by activating macrophages through INF γ production, in
agreement with that shown by other investigators45. This leads
to the destruction of parasites by increasing oxygen radical
levels, mainly nitric oxide. Furthermore, interferon ã induces
macrophages to produce IL 12, which acts on lymphocytes
and “Natural Killer” (NK) cells, potentializing the immune
response. These are ongoing findings in our works (data not
shown).
When meglumine antimoniate volume was diminished by
50% to treat Group 2 patients, treatment length was shown to
be as short (81 days) as that for Group 1, and cure rates
were the same in both groups.
Association between the antimonial drug and
immunotherapy (Group 4) showed a significant reduction in
treatment length and also approximately 18% decrease in
antimony volume, when compared with Group 1.
17
Revista da Sociedade Brasileira de Medicina Tropical 39(1):14-21, jan-fev, 2006
Immunotherapy associated with half the dose of
meglumine antimoniate (Group 5) increased treatment
length, in contrast, antimony volume was decreased by 33.3%,
consequently, minimizing the side effects caused by
Glucantime.
Group 6, receiving BCG for 15 to 20 days before
chemotherapy, showed a reduction of 7.7% in antimony
volume, with no statistical significance, and a slight increase
in treatment length for clinical cure in relation to Group 1.
The therapy comprising BCG and monthly immunotherapy
(Groups 8 and 9) did not contribute to a reduction in the
treatment period when compared with the standard treatment.
Considering the fact that other investigators only achieved 50.8%
of clinical cure at a dose of 20mg/kg/day, either through
intramuscular or intravenous route, for 20 days60, it should be noted
that our service achieved a cure rate of 100% with Glucantime
therapy (Group 1). Literature data has shown that treatment with
meglumine antimoniate for 10 or 20 days, at a dose of 20mg/kg/day,
achieves clinical cures of 61% and 67%, respectively53.
Similar results to those obtained here with the standard
treatment here (Group 1) were also achieved by our research
team in 200231 while treating 29 patients from the municipality
of Araçuaí, State of Minas Gerais. These patients had no indication
for treatment with the standard antimonial therapy, mainly due
to the presence of electrocardiographic alterations (17),
antimony allergy (4), pregnancy (6) and nephropathy (2).
Among these patients, 10 underwent immunochemotherapy and
another 19 immunotherapy. The cure rate proved to be 100%
and the mean number of series up to clinical cure was 2.3
(ranging from 1 to 4 series), while for immunochemotherapy,
this was 2.47 series, with similar variation for both therapies.
Considering that antimony may produce side effects, a
concentration reduction in ACL treatments is quite important.
However, appropriate therapy should be carried out in order
to diminish likely recurrences of the mucous form61 as well
as other kinds of recurrences that have been frequently
reported1 32 46 48 49 54 57 67 77.
Considering the broad range of therapies for ACL, there is no
consensus among those aimed at seeking a reduction in the side
effects of pentavalent antimonial drugs, there is no consensus.
Azeredo-Coutinho and Mendonça6 compared two therapies: a
continuous plan, as recommended by WHO78, and a serial one.
These investigators concluded that the cure rate obtained with the
intermittent treatment (serial) proved to be significantly higher
than that with the continuous plan. The cure criterion was defined
by complete skin epithelization observed up to three months after
the end of treatment. Surprisingly, the follow-up of the patients
was greatly superior when they were submitted to the serial
treatment. Most of the patients under continuous treatment did
not attend the Outpatient Facility throughout the complete period
of treatment. Such data corroborate our findings 34 concerning
serial treatment, although there are divergences regarding clinical
cure criteria. In the present study serial treatment was
maintained until complete healing of the cutaneous lesions
and the use of only three series was not followed.
18
Despite Machado-Coelho’s31 reports on resistance, have been
quite rare cases of resistance to Glucantime in chemotherapy
treatment have been quite rare in the municipality of Caratinga.
Patients from other regions usually seek this Out Patient Facility
due to previous failed treatments, performed in other localities.
In the case of ACL recurrence, patients attended at our
service are recommended to return to the Outpatient Facility
of Caratinga, as well as those from other regions, who are
addressed by different health units due to the popular
knowledge on treatments of cutaneous lesions provided by
this ambulatory in Caratinga. Some patients from different
regions, who underwent the treatment, indicated by the WHO78
(15mgSb/kg/day for 20 days and maximum daily dose of 15mL/
day), sought our services due to disease recurrence or
intolerance to the salt. Based on the WHO therapy, cure criterion
is the complete healing of cutaneous lesions observed up to 3
months after the treatment end, which lasts 20 days with or
without complete epithelization. Eight, from among these
patients, sought our ambulatory and underwent further
treatment with the antimony in a serial plan (a 10-day treatment
+ a 10-day rest) associated with the vaccine (0,5mL/day),
simultaneously administered with Glucantime. The
Glucantime daily dose was 1mL/5kg body weight without
exceeding 10mL/day. This treatment varied from 2 to 4 series,
which was only interrupted with clinical cure.
Several investigators have reported the side effects of
Glucantime used in different therapy plans27 26 32 45 51 64 66.
Considering the therapy plans of the current work, side effects
such as nausea, asthenia, myalgia, arthralgia and abdominal
discomfort were not observed throughout the follow-up every
20 days along with treatment until clinical cure. This might be
due to the serial plan with 10-day intervals between
administrations of N-methylglucamine antimoniate.
Due to the complexity involved in vector-host-parasite
interactions, investigators have been faced with different therapeutic
choices. No clear consensus exists among the various therapies
available in literature9 11 13 29 79 and those presented here. One of
the most serious problems is the lack of information regarding
daily doses of antimony30 45 56 69. Our therapy plans are in accordance
with maximum daily dose of antimony (10mL - 850mg/Sb/day);
thus, an intravenous treatment using 20mg/kg/day would take
1,400mg/Sb/day, or 16.47 mL, for a patient weighing 70kg, though
most investigators do not mention such information.
The results from the patients under study and those from
a casuistic of 6,900 cases, since 1965, provide strong evidence
regarding the efficacy of the therapy used here. We have only observed
5 recurrence cases, which is frequently reported when the classic
therapy recommended by the WHO1 45 48 50 54 67 68 77 is used.
The current work shows the possibility of decreasing
antimony volume for ACL treatment, with minimal occurrence
of the most likely side effects. It also offers an alternative
immunotherapy with promising results for patients, for whom
antimony use is not indicated.
Mayrink W et al
ACKNOWLEDGEMENTS
17. Dan M, Verrer E, el On J, Zuckerman F, Micheli. Failure of oral ketoconazole
to cure cutaneous ulcers caused by Leishmania braziliensis. Cutis 38:198199, 1986.
We are grateful to the Secretaria Municipal de Saúde of
Caratinga and the Consórcio Intermunicipal de Saúde of the Microregião of Caratinga, Minas Gerais State, Brazil, and Mr. Jair Cecílio
de Paula for his invaluable support during the field work.
18. El Darouti MA, alRubaie SM. Cutaneous leishmaniasis. Treatment with
combined cryotherapy and intralesional Stibogluconate injection.
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